Mike Yastrzemski

LFActive

Bats/Throws: L/LAge: 36Born: Andover, MA, United StatesDebut: May 25, 2019Draft: 2013

Mike Yastrzemski is a left fielder for the Atlanta Braves. Yastrzemski was born on August 23, 1990 in Andover, MA, United States and debuted in the major leagues on May 25, 2019. Yastrzemski bats left and throws left. The Baltimore Orioles drafted Yastrzemski in 2013 (round 14, pick 429 overall) out of Vanderbilt. In 2026, Yastrzemski is batting .224 with 12 home runs, 41 RBI and an OPS of .688 in 139 games. MLBDB has 8 seasons of statistics for Yastrzemski, from 2019 to 2026.

HR122026 season

RBI412026 season

OPS.6882026 season

Seasons8Atlanta Braves

Hitting

8 seasons of hitting across 3 clubs. Club-specific splits are shown in lighter type.

Mike Yastrzemski, season by season hittingRegular season, oldest first
Season	Team	G	PA	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS
2019SF	SFSan Francisco	107	411	371	64	101	22	3	21	55	2	32	107	.272	.334	.518	.852
2020SF	SFSan Francisco	54	225	192	39	57	14	4	10	35	2	30	55	.297	.400	.568	.968
2021SF	SFSan Francisco	139	532	468	75	105	28	3	25	71	4	51	131	.224	.311	.457	.768
2022SF	SFSan Francisco	148	558	485	73	104	31	2	17	57	5	61	141	.214	.305	.392	.697
2023SF	SFSan Francisco	106	381	330	54	77	23	1	15	43	2	45	99	.233	.330	.445	.775
2024SF	SFSan Francisco	140	474	428	60	99	16	9	18	57	3	38	124	.231	.302	.437	.739
2025All	All teams	147	558	477	68	111	28	1	17	46	7	72	108	.233	.333	.403	.735
2025SF	SFSan Francisco	97	372	321	38	74	14	1	8	28	6	47	86	.231	.330	.355	.685
2025KC	KCKansas City	50	186	156	30	37	14	0	9	18	1	25	22	.237	.339	.500	.839
2026ATL	ATLAtlanta	139	408	361	51	81	18	1	12	41	1	41	98	.224	.309	.380	.688

G: Games played in any role, including games spent only pitching or running the bases.
PA: Plate appearances. Completed turns at the plate, including walks, hit-by-pitches and sacrifices.
AB: At bats. Plate appearances that count toward batting average; walks, hit-by-pitches, sacrifices and catcher's interference are left out.
R: Runs scored.
H: Hits.
2B: Doubles.
3B: Triples.
HR: Home runs.
RBI: Runs batted in.
SB: Stolen bases.
BB: Walks, including intentional walks.
SO: Strikeouts.
AVG: Batting average. Formula: H ÷ AB.
OBP: On-base percentage. Formula: (H + BB + HBP) ÷ (AB + BB + HBP + SF).
SLG: Slugging percentage, total bases per at bat. Formula: TB ÷ AB.
OPS: On-base plus slugging. Formula: OBP + SLG.

Mike Yastrzemski, expanded hitting by seasonRegular season, oldest first
Season	Team	1B	TB	CS	SB%	HBP	IBB	SH	SF	GIDP	GO/AO	LOB	AB/HR	BB/K
2019SF	SFSan Francisco	55	192	4	33.3%	4	1	1	3	4	0.80	148	17.67	0.30
2020SF	SFSan Francisco	29	109	1	66.7%	3	2	0	0	2	1.00	63	19.20	0.55
2021SF	SFSan Francisco	49	214	0	100.0%	9	4	1	3	3	0.72	201	18.72	0.39
2022SF	SFSan Francisco	54	190	1	83.3%	5	0	1	6	3	0.68	216	28.53	0.43
2023SF	SFSan Francisco	38	147	2	50.0%	3	3	2	1	5	0.64	137	22.00	0.45
2024SF	SFSan Francisco	56	187	2	60.0%	6	1	1	1	5	0.70	180	23.78	0.31
2025All	All teams	65	192	2	77.8%	2	4	2	5	7	0.56	200	28.06	0.67
2025SF	SFSan Francisco	51	114	2	75.0%	1	4	2	1	4	0.73	140	40.13	0.55
2025KC	KCKansas City	14	78	0	100.0%	1	0	0	4	3	0.35	60	17.33	1.14
2026ATL	ATLAtlanta	50	137	0	100.0%	4	0	0	2	5	0.74	149	30.08	0.42

1B: Singles. Formula: H − 2B − 3B − HR.
TB: Total bases from hits. Formula: 1B + 2 × 2B + 3 × 3B + 4 × HR.
CS: Times caught stealing.
SB%: Stolen-base success rate. Formula: 100 × SB ÷ (SB + CS).
HBP: Times hit by a pitch.
IBB: Intentional walks.
SH: Sacrifice bunts.
SF: Sacrifice flies.
GIDP: Times grounded into a double play.
GO/AO: Ground outs per air out. Air outs are outs on fly balls, line drives and popups. Formula: GO ÷ AO.
LOB: Left on base. Runners still on base when the batter made an out.
AB/HR: At bats per home run. Formula: AB ÷ HR.
BB/K: Walks per strikeout. Formula: BB ÷ SO.

Mike Yastrzemski, advanced hitting by seasonRegular season, oldest first
Season	Team	PA	AB	ISO	BABIP	HR%	K%	BB%	wOBA	wRAA	wRC
2019SF	SFSan Francisco	411	371	.245	.325	5.1%	26.0%	7.8%	.353	11.6	63.4
2020SF	SFSan Francisco	225	192	.271	.370	4.4%	24.4%	13.3%	.407	16.5	44.6
2021SF	SFSan Francisco	532	468	.233	.254	4.7%	24.6%	9.6%	.326	5.2	69.6
2022SF	SFSan Francisco	558	485	.177	.261	3.0%	25.3%	10.9%	.307	-1.4	62.2
2023SF	SFSan Francisco	381	330	.212	.286	3.9%	26.0%	11.8%	.333	4.7	51.2
2024SF	SFSan Francisco	474	428	.206	.282	3.8%	26.2%	8.0%	.319	3.4	58.8
2025All	All teams	558	477	.170	.263	3.0%	19.4%	12.9%	.321	3.5	69.3
2025SF	SFSan Francisco	372	321	.125	.289	2.2%	23.1%	12.6%	.303	-3.1	40.8
2025KC	KCKansas City	186	156	.263	.217	4.8%	11.8%	13.4%	.356	6.5	28.4
2026ATL	ATLAtlanta	408	361	.155	.273	2.9%	24.0%	10.0%	.306	-3.6	45.0

PA: Plate appearances. Completed turns at the plate, including walks, hit-by-pitches and sacrifices.
AB: At bats. Plate appearances that count toward batting average; walks, hit-by-pitches, sacrifices and catcher's interference are left out.
ISO: Isolated Power. Extra bases per at-bat, separating extra-base power from batting average. Formula: (2B + 2 × 3B + 3 × HR) ÷ AB.
BABIP: Batting Average on Balls in Play. Hits on balls in play, excluding home runs. Contact quality, speed and defense all affect BABIP. Formula: (H − HR) ÷ (AB − SO − HR + SF).
HR%: Home-run rate. Formula: 100 × HR ÷ PA.
K%: Batting Strikeout Percentage. The percentage of plate appearances ending in a strikeout. Lower rates mean fewer strikeouts per opportunity. Formula: 100 × SO ÷ PA.
BB%: Batting Walk Percentage. The percentage of plate appearances ending in a walk, including intentional walks. Formula: 100 × BB ÷ PA.
wOBA: Weighted On-Base Average. Values each batting outcome by its contribution to scoring, using the matching season's run weights. Intentional walks are excluded. Formula: Weighted sum of unintentional BB, HBP, 1B, 2B, 3B and HR ÷ (AB + BB − IBB + SF + HBP).
wRAA: Weighted Runs Above Average. Batting runs above or below league average at the same number of plate appearances. Negative values are below average. This measure is not adjusted for ballpark. Formula: (wOBA − league wOBA) ÷ wOBA scale × PA.
wRC: Weighted Runs Created. Estimated batting runs created from wOBA and plate appearances, using the matching season's league scoring environment. This is not park-adjusted wRC+. Formula: [(wOBA − league wOBA) ÷ wOBA scale + league runs per PA] × PA.

Read advanced measures alongside playing time. N/A means the required inputs or season calculations are unavailable.

Advanced calculation notes by season

Pitching

2 seasons of pitching across 1 club. Season totals, oldest first. The team shown identifies the player's club when the totals were recorded.

Mike Yastrzemski, season by season pitchingRegular season, oldest first
Season	Team	W	L	W-L%	ERA	G	GS	SV	IP	H	R	ER	HR	BB	SO	WHIP
2024SF	SFSan Francisco	0	0	N/A	18.00	1	0	0	1.0	2	2	2	0	3	0	5.00
2025SF	SFSan Francisco	0	0	N/A	18.00	1	0	0	1.0	2	2	2	0	1	0	3.00

W: Wins.
L: Losses.
W-L%: Win-loss percentage. Formula: W ÷ (W + L).
ERA: Earned run average, earned runs per nine innings. Formula: 27 × ER ÷ outs recorded.
G: Games pitched.
GS: Games started.
SV: Saves.
IP: Innings pitched. .1 and .2 mean one and two outs.
H: Hits allowed.
R: Runs allowed, earned and unearned.
ER: Earned runs allowed.
HR: Home runs allowed.
BB: Walks allowed, including intentional walks.
SO: Strikeouts.
WHIP: Walks plus hits per inning pitched. Formula: 3 × (BB + H) ÷ outs recorded.

Fielding

8 seasons of fielding across 3 clubs. Club-specific splits are shown in lighter type. Games at different positions can overlap.

Mike Yastrzemski, fielding by seasonRegular season, oldest first
Season	Team	Pos	G	GS	INN	TC	PO	A	E	DP	FLD%	RF/9	RF/G
2019SF	SFSan Francisco	LF	61	42	401.0	91	88	0	3	0	.967	1.98	1.44
2019SF	SFSan Francisco	CF	7	2	30.0	7	7	0	0	0	1.000	2.10	1.00
2019SF	SFSan Francisco	RF	56	45	390.0	97	94	2	1	0	.990	2.22	1.71
2020SF	SFSan Francisco	LF	8	1	20.0	6	6	0	0	0	1.000	2.70	0.75
2020SF	SFSan Francisco	CF	24	24	186.0	56	55	1	0	1	1.000	2.71	2.33
2020SF	SFSan Francisco	RF	31	27	227.1	60	59	1	0	0	1.000	2.38	1.94
2021SF	SFSan Francisco	CF	34	29	227.1	53	51	2	0	1	1.000	2.10	1.56
2021SF	SFSan Francisco	RF	115	90	831.2	210	208	1	1	0	.995	2.26	1.82
2022SF	SFSan Francisco	CF	93	74	572.0	162	156	5	1	3	.994	2.53	1.73
2022SF	SFSan Francisco	RF	104	51	555.2	121	115	4	2	0	.983	1.93	1.14
2022SF	SFSan Francisco	DH	1	1	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2023SF	SFSan Francisco	LF	17	8	86.1	22	21	0	1	0	.955	2.19	1.24
2023SF	SFSan Francisco	CF	51	44	351.1	81	79	2	0	1	1.000	2.07	1.59
2023SF	SFSan Francisco	RF	56	38	346.0	79	75	4	0	0	1.000	2.05	1.41
2023SF	SFSan Francisco	DH	1	1	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2024SF	SFSan Francisco	P	1	0	1.0	0	0	0	0	0	N/A	0.00	0.00
2024SF	SFSan Francisco	CF	9	7	65.1	24	24	0	0	0	1.000	3.31	2.67
2024SF	SFSan Francisco	RF	127	113	976.2	197	188	5	4	1	.980	1.78	1.52
2025All	All teams	P	1	0	1.0	0	0	0	0	0	N/A	0.00	0.00
2025All	All teams	LF	7	6	46.0	9	9	0	0	0	1.000	1.76	1.29
2025All	All teams	CF	10	5	41.0	7	7	0	0	0	1.000	1.54	0.70
2025All	All teams	RF	133	114	1013.2	228	216	11	1	0	.996	2.02	1.71
2025All	All teams	DH	4	4	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2025SF	SFSan Francisco	RF	94	85	763.1	157	147	9	1	0	.994	1.84	1.66
2025SF	SFSan Francisco	P	1	0	1.0	0	0	0	0	0	N/A	0.00	0.00
2025KC	KCKansas City	RF	39	29	250.1	71	69	2	0	0	1.000	2.55	1.82
2025KC	KCKansas City	CF	10	5	41.0	7	7	0	0	0	1.000	1.54	0.70
2025KC	KCKansas City	LF	7	6	46.0	9	9	0	0	0	1.000	1.76	1.29
2025KC	KCKansas City	DH	4	4	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2026ATL	ATLAtlanta	LF	83	64	557.2	123	118	2	3	0	.976	1.94	1.45
2026ATL	ATLAtlanta	CF	1	0	2.0	0	0	0	0	0	N/A	0.00	0.00
2026ATL	ATLAtlanta	RF	50	36	325.0	83	80	3	0	0	1.000	2.30	1.66
2026ATL	ATLAtlanta	DH	4	3	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Pos: Position played. DH is designated hitter.
G: Games played at the position.
GS: Games started at the position.
INN: Innings in the field at the position. .1 and .2 mean one and two outs.
TC: Total chances. Formula: PO + A + E.
PO: Putouts.
A: Assists.
E: Errors.
DP: Double plays turned.
FLD%: Fielding percentage. Formula: (PO + A) ÷ TC.
RF/9: Range factor per nine innings. Formula: 27 × (PO + A) ÷ outs in the field.
RF/G: Range factor per game. Formula: (PO + A) ÷ G.

A designated hitter does not play in the field, so DH rows show N/A for fielding measures.

Batted-ball data

Recorded measurements and MLBDB estimates from the pitches seen and the balls put in play as a hitter. Each table's note says which.

MLBDB calculates these numbers from recorded game measurements. EV balls and LA balls show the sample sizes. EV+LA balls have both measurements and are used for barrel percentage. Seasons without these measurements show N/A.

Mike Yastrzemski, hitting by season: contactRegular season, oldest first
Season	Team	BBE	EV+LA balls	MLBDB barrels	MLBDB Barrel%	EV balls	Avg EV balls	Avg EV	Max EV	Hard-hit%	LA balls	Avg LA balls	Avg LA	Sweet-spot%
2019SF	SFSan Francisco	268	235	29	12.3%	235	234	90.6	108.5	48.9%	235	234	16.7	42.1%
2020SF	SFSan Francisco	137	137	15	10.9%	137	137	88.2	105.6	42.3%	137	137	18.3	39.4%
2021SF	SFSan Francisco	341	339	35	10.3%	339	334	89.5	109.4	39.5%	339	334	19.4	34.5%
2022SF	SFSan Francisco	351	350	39	11.1%	350	346	89.9	109.7	42.6%	350	346	19.9	37.4%
2023SF	SFSan Francisco	234	233	24	10.3%	233	228	90.1	110.1	44.2%	234	229	19.6	35.5%
2024SF	SFSan Francisco	306	304	32	10.5%	304	299	90.4	108.2	41.1%	304	299	19.1	34.2%
2025All	All teams	376	374	32	8.6%	374	365	90.8	109.3	42.8%	375	366	20.4	37.9%
2025SF	SFSan Francisco	238	236	17	7.2%	236	227	89.9	108.5	39.8%	237	228	17.6	34.2%
2025KC	KCKansas City	138	138	15	10.9%	138	138	92.2	109.3	47.8%	138	138	25.1	44.2%
2026ATL	ATLAtlanta	265	265	18	6.8%	265	262	90.4	107.0	43.0%	265	262	16.2	34.3%

BBE: Batted Balls. Completed turns to bat that ended with a batted ball, including home runs. Some balls have no speed or angle measurement.
EV+LA balls: Balls with Recorded Speed and Angle. Balls that have both a usable speed and angle measurement. These are the balls used to calculate barrel percentage.
MLBDB barrels: MLBDB Barrels. Balls hit very hard at an angle suited to deep hits. MLBDB checks the recorded speed and angle against its documented barrel zone. Balls missing either measurement are left out. Rounded measurements can affect close calls. This is MLBDB's calculated classification.
MLBDB Barrel%: MLBDB Barrel Percentage. The percentage of balls with both speed and angle recorded that MLBDB counts as barrels. Missing measurements are left out. Formula: 100 × barrels ÷ balls with recorded speed and angle.
EV balls: Balls with Recorded Speed. All batted balls with a usable speed measurement, including bunts. This is the sample used for hard-hit percentage.
Avg EV balls: Average Exit Velocity Sample. Balls with recorded speed, excluding labelled bunts. Used for average and maximum exit velocity.
Avg EV: Average Exit Velocity. Average ball speed just after contact, in miles per hour. Balls with no speed measurement are left out. Balls labelled as bunts are excluded. Unknown bunt labels are retained. Formula: Sum of recorded speeds excluding labelled bunts ÷ Avg EV balls.
Max EV: Maximum Exit Velocity. The fastest recorded batted ball, in miles per hour. Balls labelled as bunts are excluded. Unknown bunt labels are retained.
Hard-hit%: Hard-Hit Percentage. The percentage of speed-measured balls hit at least 95 miles per hour. Formula: 100 × hard-hit balls ÷ balls with recorded speed.
LA balls: Balls with Recorded Angle. All batted balls with a usable angle measurement, including bunts. This is the sample used for sweet-spot percentage.
Avg LA balls: Average Launch Angle Sample. Balls with recorded angle, excluding labelled bunts. Used for average launch angle.
Avg LA: Average Launch Angle. Average angle at which the ball leaves the bat, in degrees. A negative angle points toward the ground. Higher is not always better. Balls labelled as bunts are excluded. Unknown bunt labels are retained. Formula: Sum of recorded angles excluding labelled bunts ÷ Avg LA balls.
Sweet-spot%: Sweet-Spot Percentage. The percentage of angle-measured balls launched from 8 to 32 degrees. Formula: 100 × sweet-spot balls ÷ balls with recorded angle.

Direction is estimated from recorded hit locations and the hand used to bat on each play. Rates divide by Located balls and show N/A below 95% location coverage. Unmapped balls are left out. Higher is not always better.

Mike Yastrzemski, hitting by season: hit directionRegular season, oldest first
Season	Team	Located balls	Location coverage	Pull%	Center%	Oppo%	Pull balls	Center balls	Oppo balls	Unmapped balls
2019SF	SFSan Francisco	268	100.0%	43.3%	29.9%	26.9%	116	80	72	0
2020SF	SFSan Francisco	135	98.5%	40.7%	40.7%	18.5%	55	55	25	2
2021SF	SFSan Francisco	340	99.7%	44.4%	35.6%	20.0%	151	121	68	1
2022SF	SFSan Francisco	351	100.0%	46.7%	30.5%	22.8%	164	107	80	0
2023SF	SFSan Francisco	233	99.6%	44.6%	36.1%	19.3%	104	84	45	1
2024SF	SFSan Francisco	305	99.7%	49.8%	30.8%	19.3%	152	94	59	1
2025All	All teams	374	99.5%	42.2%	31.8%	25.9%	158	119	97	2
2025SF	SFSan Francisco	237	99.6%	41.8%	32.9%	25.3%	99	78	60	1
2025KC	KCKansas City	137	99.3%	43.1%	29.9%	27.0%	59	41	37	1
2026ATL	ATLAtlanta	264	99.6%	46.2%	34.1%	19.7%	122	90	52	1

Located balls: Balls with Usable Hit Locations. Balls whose recorded location and batting hand support an estimate of pull, center or opposite-field direction.
Location coverage: Hit-Location Coverage. The share of all balls that can be mapped. A rounded 95% can be slightly below the cutoff; the cutoff uses the original counts. Formula: 100 × located balls ÷ all batted balls.
Pull%: Estimated Pull Percentage. The share of located balls hit toward the batter's pull side. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × pulled balls ÷ located balls.
Center%: Estimated Center-Field Percentage. The share of located balls estimated toward center field. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × center-field balls ÷ located balls.
Oppo%: Estimated Opposite-Field Percentage. The share of located balls hit toward the side opposite the batter's pull side. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × opposite-field balls ÷ located balls.
Pull balls: Estimated Pulled Balls. Balls estimated toward the pull side: left field for right-handed hitters, or right field for left-handed hitters.
Center balls: Estimated Balls to Center. Balls estimated toward center field, regardless of batting hand.
Oppo balls: Estimated Opposite-Field Balls. Balls estimated toward the opposite side: right field for right-handed hitters, or left field for left-handed hitters.
Unmapped balls: Balls with Unusable Hit Locations. Balls with missing details, unusable coordinates or locations outside the field area used for these estimates. They are excluded from direction percentages.

Pitches counts every pitch actually thrown; automatic balls and strikes are left out. Swings include bunt attempts, and caught foul tips count as whiffs. Whiff% divides misses by swings; SwStr% divides misses by pitches. Zone rates need a recorded location for at least 95% of pitches. Missing results show N/A. For 2018 through 2024, inside or outside the zone is an MLBDB estimate from recorded pitch locations and batter zone heights; from 2025, MLB's recorded zone labels are used.

Mike Yastrzemski, hitting by season: pitch disciplineRegular season, oldest first
Season	Team	Pitches	Swings	Whiff%	SwStr%	Contact%	Swing%	Chase%	Zone%	Z-Swing%	Z-Contact%	O-Contact%	First delivered strike%	Called%	CSW%	Zone coverage
2019SF	SFSan Francisco	1632	777	27.3%	13.0%	72.7%	47.6%	27.3%	49.5%	68.3%	78.1%	59.6%	61.6%	16.4%	29.4%	99.9%
2020SF	SFSan Francisco	940	368	24.7%	9.7%	75.3%	39.1%	19.8%	49.6%	58.8%	81.4%	57.4%	60.4%	21.0%	30.6%	100.0%
2021SF	SFSan Francisco	2103	965	24.2%	11.1%	75.8%	45.9%	23.4%	50.6%	67.8%	81.3%	59.3%	58.4%	16.5%	27.7%	100.0%
2022SF	SFSan Francisco	2349	1008	22.7%	9.7%	77.3%	42.9%	22.2%	50.2%	63.5%	84.2%	57.1%	60.1%	18.7%	28.4%	100.0%
2023SF	SFSan Francisco	1573	648	23.6%	9.7%	76.4%	41.2%	20.3%	49.3%	62.7%	82.9%	56.8%	57.1%	19.7%	29.4%	100.0%
2024SF	SFSan Francisco	1955	862	26.1%	11.5%	73.9%	44.1%	23.9%	50.6%	63.8%	80.0%	57.0%	56.3%	18.2%	29.7%	99.8%
2025All	All teams	2305	964	19.0%	7.9%	81.0%	41.8%	22.1%	50.5%	61.2%	85.8%	67.5%	55.6%	18.7%	26.6%	100.0%
2025SF	SFSan Francisco	1504	634	21.5%	9.0%	78.5%	42.2%	23.0%	49.8%	61.4%	83.0%	66.7%	58.2%	19.2%	28.3%	100.0%
2025KC	KCKansas City	801	330	14.2%	5.9%	85.8%	41.2%	20.2%	51.7%	60.9%	90.9%	69.2%	50.5%	17.7%	23.6%	100.0%
2026ATL	ATLAtlanta	1736	740	23.2%	9.9%	76.8%	42.6%	26.4%	49.1%	59.5%	84.4%	60.1%	58.3%	19.9%	29.8%	100.0%

Pitches: Delivered Pitches. Pitches actually thrown to the batter in these completed games. Automatic balls and strikes are excluded.
Swings: Swings. Attempts to hit a delivered pitch, including bunts.
Whiff%: Whiff Percentage. How often a swing is recorded as a miss, including caught foul tips. This divides whiffs by swings. Formula: 100 × swings and misses ÷ swings.
SwStr%: Swinging-Strike Percentage. How often a delivered pitch produces a whiff, including caught foul tips. This divides whiffs by pitches, not swings. Formula: 100 × swings and misses ÷ delivered pitches.
Contact%: Contact Percentage. How often a swing touches the ball, including ordinary fouls and bunt attempts. Caught foul tips are excluded. Formula: 100 × swings with contact ÷ swings.
Swing%: Swing Percentage. How often the batter swings at a delivered pitch. Formula: 100 × swings ÷ delivered pitches.
Chase%: Chase Percentage. How often the batter swings at a pitch outside the strike zone. Also called O-Swing%. Formula: 100 × swings outside the zone ÷ pitches outside the zone.
Zone%: Strike-Zone Percentage. The share of pitches with usable locations that are inside the strike zone. Formula: 100 × pitches inside the zone ÷ pitches with usable locations.
Z-Swing%: Swing Percentage Inside the Zone. How often the batter swings at a pitch inside the strike zone. Formula: 100 × swings inside the zone ÷ pitches inside the zone.
Z-Contact%: Contact Percentage Inside the Zone. How often a swing at a pitch inside the strike zone touches the ball. Formula: 100 × contact inside the zone ÷ swings inside the zone.
O-Contact%: Contact Percentage Outside the Zone. How often a swing at a pitch outside the strike zone touches the ball. Formula: 100 × contact outside the zone ÷ swings outside the zone.
First delivered strike%: First Delivered Pitch Strike Rate. The share of first delivered pitches that are strikes or put in play. Turns with no delivered pitch are excluded. Unfinished turns that had a pitch are included. Formula: 100 × first-pitch strikes ÷ first delivered pitches.
Called%: Called-Strike Percentage. How often a delivered pitch is called a strike without a swing. Formula: 100 × called strikes ÷ delivered pitches.
CSW%: Called Strikes and Whiffs. How often a delivered pitch is either a called strike or a swing and miss. Ordinary fouls are excluded; caught foul tips count as whiffs. Formula: 100 × called strikes plus misses ÷ delivered pitches.
Zone coverage: Pitch-Location Coverage. The share of delivered pitches with a usable location. Zone rates need at least 95% coverage, checked before rounding.

MLBDB estimates these from recorded ball speed and angle, for seasons from 2018. A season or period shows N/A if any batted ball it needs is missing a measurement or falls outside what the model covers. That is common over a full season, and in 2018 and 2019 no regular player has complete measurements. Differences use actual results from the same completed games. These describe recorded contact, not future performance.

Mike Yastrzemski, hitting by season: expectedRegular season, oldest first
Season	Team	Model balls	Measured%	MLBDB xBA	AVG − MLBDB xBA	MLBDB xSLG	SLG − MLBDB xSLG	MLBDB xwOBA	wOBA − MLBDB xwOBA	Missing pairs
2019SF	SFSan Francisco	235	87.7%	N/A	N/A	N/A	N/A	N/A	N/A	33
2020SF	SFSan Francisco	137	100.0%	.252	0.045	.491	0.077	.366	0.041	0
2021SF	SFSan Francisco	339	99.4%	N/A	N/A	N/A	N/A	N/A	N/A	2
2022SF	SFSan Francisco	350	99.7%	N/A	N/A	N/A	N/A	N/A	N/A	1
2023SF	SFSan Francisco	233	99.6%	N/A	N/A	N/A	N/A	N/A	N/A	1
2024SF	SFSan Francisco	304	99.3%	N/A	N/A	N/A	N/A	N/A	N/A	2
2025All	All teams	374	99.5%	N/A	N/A	N/A	N/A	N/A	N/A	2
2025SF	SFSan Francisco	236	99.2%	N/A	N/A	N/A	N/A	N/A	N/A	2
2025KC	KCKansas City	138	100.0%	.280	-0.043	.546	-0.046	.392	-0.036	0
2026ATL	ATLAtlanta	265	100.0%	.238	-0.014	.372	0.007	.311	-0.005	0

Model balls: Measured Balls Used in Estimates. Eligible batted balls with both speed and angle recorded. Defensive awards that do not count as at-bats are excluded.
Measured%: Expected-Stat Measurement Coverage. The share of eligible batted balls with both speed and angle recorded. Each expected statistic shows N/A if any contact value it needs is missing or outside model support.
MLBDB xBA: MLBDB Expected Batting Average. Estimated hits per at-bat from ball speed, angle and same-season running speed when available. Strikeouts remain at-bats. Each needed contact contribution must be available. Reviewed seasons are 2018 through 2026; the current season is provisional. Formula: Estimated hits in at-bats ÷ at-bats.
AVG − MLBDB xBA: Batting Average Minus Expected. Recorded batting average minus the estimate, using the same completed games. A positive number means the actual result was higher. This does not measure luck alone.
MLBDB xSLG: MLBDB Expected Slugging Percentage. Estimated bases from hits per at-bat. Singles count once, doubles twice, triples three times and home runs four times. Formula: Estimated total bases in at-bats ÷ at-bats.
SLG − MLBDB xSLG: Slugging Minus Expected. Recorded slugging minus the estimate, using the same completed games. A positive number means more bases were recorded than estimated.
MLBDB xwOBA: MLBDB Expected Weighted Batting Average. Combines reconstructed expected contact values with recorded walks and hit-by-pitches. Walks and hit batters use the same season's batting weights. Intentional walks are excluded. Every needed contact value must be available.
wOBA − MLBDB xwOBA: Weighted Average Minus Expected. Recorded weighted batting average minus the estimate, using the same completed games and batting weights.
Missing pairs: Balls with Incomplete Measurements. Eligible balls missing speed, angle or both. These inputs are not filled in. The affected expected statistic is N/A, and the real appearance remains counted.

Last 5 games

Mike Yastrzemski, batting in the last 5 gamesNewest first
Date	Game	Result	AB	BB	SO
Oct 7	vs LADvs Los Angeles Dodgers	L 1-4	1	1	0
Oct 6	vs LADvs Los Angeles Dodgers	L 1-3	1	0	0
Oct 4	@ LAD@ Los Angeles Dodgers	W 3-2	1	0	1
Oct 1	vs PHIvs Philadelphia Phillies	W 6-2	4	0	2
Sep 30	vs PHIvs Philadelphia Phillies	L 3-4	1	0	0

Bio

Full name: Michael Andrew Yastrzemski
Position: Left fielder (LF)
Bats / Throws: L / L
Height / Weight: 5' 10", 180 lb
Number: 18
Born: Aug 23, 1990, Andover, MA, United States
Age: 36
MLB debut: May 25, 2019
Draft: 2013 draft, round 14, pick 429, Baltimore Orioles
School: Vanderbilt

Trade & Transaction History

4 recorded moves.

Jul 21, 2026

Status Change

Atlanta Braves activated LF Mike Yastrzemski from the 10-day injured list.

To Atlanta Braves

Jul 11, 2026

Status Change

Atlanta Braves placed LF Mike Yastrzemski on the 10-day injured list. Left elbow inflammation.

To Atlanta Braves

Apr 16, 2026

Number Change

RF Mike Yastrzemski changed number to 18.

To Atlanta Braves

Apr 15, 2026

Number Change

RF Mike Yastrzemski changed number to 42.

To Atlanta Braves